RE: 10gig coast to coast

[James Braunegg <james.braunegg () micron21 com>]

Dear Valdis

Thanks for your comments, whilst I know you can optimize servers for TCP windowing I was more talking about network 
backhaul where you don't have control over the server sending the traffic.

ie backhauling IP transit over the southern cross cable system

Kindest Regards


James Braunegg
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-----Original Message-----
From: Valdis.Kletnieks () vt edu [mailto:Valdis.Kletnieks () vt edu] 
Sent: Wednesday, June 19, 2013 3:19 AM
To: James Braunegg
Cc: Phil Fagan; Jakob Heitz; <nanog () nanog org>
Subject: Re: 10gig coast to coast

On Tue, 18 Jun 2013 15:53:48 -0000, James Braunegg said:
> We Deal with TCP window size all day every day across the southern 
> cross from LA to Australia which adds around 160ms...  I've given up 
> looking for a solution to get around physical physics of sending TCP 
> traffic a long distance at a high speed....

http://www.extremetech.com/extreme/141651-caltech-and-uvic-set-339gbps-internet-speed-record

It's apparently doable. ;)

A quick cheat sheet for the low-hanging fruit:

http://www.psc.edu/index.php/networking/641-tcp-tune

Though to get to *really* high througput, you may have to play some games with TCP slow-start so it's not quite as slow 
(otherwise for long hauls it can take literally hours to open the window after a packet burp at 10G or higher)

Also, you may want to look at CODEL or related queueing disciplines to minimize the amount of trouble that bufferbloat 
can cause you at high speeds.